first and second positions of the Uniform SMR Code
format as follows:
This manual lists spares and repair parts; special tools;
special test, measurement, and diagnostic equipment
(TMDE), and other special support equipment required
PA --Item procured and stocked for anticipated or
for performance of general support maintenance of the
AN/UYH-l. It authorizes the requisitioning and issue
XA --Item is not procured or stocked because the re-
of spares and repair parts as indicated by the source
quirements for the item will result in the re-
and maintenance codes.
placement of the next higher assembly.
XB --Item is procured or stocked. If not available
through salvage, requisition.
This Repair Parts and Special Tools List is divided into
XD --A support item that is not stocked. When re-
the following sections:
quired, item will be procured through normal
a. Section 11. Repair Parts List. A list of spares and
repair parts authorized for use in the performance of
maintenance. The list also includes parts which must
be removed for replacement of the authorized parts.
Parts lists are composed of functional groups in numeric
sequence, with the parts in each group listed in figure
Cannibalization or salvage maybe used as a
and item number sequence.
source of supply for any items source coded
b. Section Ill. Special Tools List. Not applicable.
above except those coded XA and aircraft
c. Section IV. National Stock Number and Part Num-
support items as restricted by AR 750-1.
ber . A list, in National item identification number
(NIIN) sequence, of all National stock numbers (NSN)
(2) Maintenance code. Maintenance codes are as-
appearing in the listings, followed by a list, in alpha-
signed to indicate the levels of maintenance authorized
numeric sequence, of all part numbers appearing in the
to USE and REPAIR support items. The maintenance
listings. National stock numbers and part numbers are
codes are entered in the third and fourth positions of
cross-referenced to each illustration figure and item
the Uniform SMR Code format as follows:
(a) The maintenance code entered in the third
position will indicate the lowest maintenance level au-
3. Explanation of Columns
thorized to remove, replace, and use the support item.
The maintenance code entered in third position wil in-
a. Illustration. This column is divided as follows:
dicate one of the following levels of maintenance:
(1) Figure number. Indicates the figure number of
the illustration on which the item is shown.
(2) Item number. The number used to identify item
O --Support item is removed, replaced, used at the
called out in the illustration.
b. Source, Maintenance, and Recoverability (SMR)
F --Support item is removed, replaced, used at the
direct support level.
(1) Source code. Source codes indicate the manner
H --Support item is removed, replaced, used at the
of acquiring support items for maintenance, repair, or
general support level.
overhaul of end items. Source codes are entered in the